CRAN failure in r-devel due to new bitstring class

[MichaelChirico]

{bit64} is failing on CRAN because {utils} added a bitstring class in r89620:

r-devel/r-svn@ebe6046

That causes a warning in r-devel due to clashing S3 registration:

  Registered S3 method from a standard package overwritten by 'bit64':
    method          from 
    print.bitstring tools

I'm working with Deepayan on how best to address this; initial guess is that we'll simply optionally unregister our print.bitstring method while any other work towards merging the classes proceeds.

There is one apparent downstream package using this on CRAN: {ravetools}

https://github.com/dipterix/ravetools/blob/acb1fb50a1b2572f2bfacd7466845b98490325ff/man/raw-to-sexp.Rd#L140-L146

They would not be affected by a change to the print() method so not involving them for now.